Year	Percent
1996-01-01	29.172500000000000
1997-01-01	28.729800000000000
1998-01-01	31.718900000000000
1999-01-01	28.595400000000000
2000-01-01	28.108100000000000
2001-01-01	29.420600000000000
2002-01-01	30.898500000000000
2003-01-01	31.101999999999997
2004-01-01	36.779500000000000
2005-01-01	39.311000000000000
2006-01-01	41.652700000000000
2007-01-01	43.877700000000000
2008-01-01	44.886000000000000
2009-01-01	44.272200000000000
2010-01-01	46.006100000000000
2011-01-01	47.285700000000000
2012-01-01	47.147000000000000
2013-01-01	47.577000000000000
2014-01-01	48.378800000000000
2015-01-01	46.398100000000000
2016-01-01	46.579300000000000